In a diffraction pattern due to a single slit of width a, the first minimum is observed at an angle 30 degree∘ when light of wavelength 5000 Å is incident on the slit. The first secondary minimum is observed at an angle of In a diffraction pattern due to a single slit of width a the first minimum is observed at an angle 30 degree∘ when light of wavelength 5000 Å is incident on the slit. The first secondary minimum is observed at an angle of August 20, 2020 Category: Chapter 32 - Ray Optics , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics , Facebook Messenger WhatsApp Share this:TwitterFacebook Related A parallel beam of light of wavelength 500 nm falls on a narrow slit and the resulting diffraction pattern is observe on screen 1 m away. It is observed that the first minimum is at a distance of 2.5mm from the centre of the screen. Find the width of the slit.Angular width of central maxima in the Fraunhoffer diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength 6000Å. When the slit is illuminated by light of another wavelength, the angular width decreases by 30%. The wavelength of this light will beAt the first minimum adjacent to the central maximum of a single-slit diffraction pattern the phase difference between the Huygens wavelet from the edge of the slit and the wavelet from the mid-point of the slit is
